Analysis of two developing short circuit faults in 35 kV power system by low resistance grounding
According to two developing short circuit faults of busbar in a 35 kV power system by low resistance grounding,which is correct operation of relay protection but 35 kV C-GIS are damaged,analysis cause and improvement suggestions are proposed.Combined with fault recording and inspection,fault processes and protection operations are analyzed by symmetrical component method,simulated and verified by PSCAD/EMTDC.The unreasonable configuration and setting of relay protection are main cause and the improvements are proposed.
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